The technique taken during this record is to aim to provide an explanation for, in a simplified demeanour, how a specific explosion mitigation method works. this can be then equipped upon to explain the conditions within which the mitigation strategy works and people conditions the place it's going to now not paintings. the place attainable, examples could be used to demonstrate the innovations being defined. This rfile is meant to hide measures which may be taken to mitigate an explosion or its effects. considering a few those measures are activated on fuel detection and ahead of ignition, the record contains a qualitative dialogue of gasoline detection. this can be within the context of activities which may be taken whilst fuel is detected.
desk of Contents
1. advent and Scope
2. layout & recognition standards
three. activities on gasoline Detection
four. Mitigation by means of Inhibiting Combustion
five. Explosion aid Panels (ERP's)
6. Combining Mitigation Measures
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Additional resources for Explosion Mitigation Systems
3. ERA Conference 1992: Offshore structural design against extreme loads, London, 1992. 4. ERA Conference 1993: Offshore structural design against extreme loads, London, 1992. 5. Gas Explosion Handbook, Christian Michelsen Research, Bergen, Noway. 6. FABIG Newsletter, issues 1-8, The Steel Construction Institute, 1992-1994. Job No. rhe Steel Construction [nstitute jilwood Park Ascot Berks SL5 7QN l'elephone:(0344) 23345 kc(0344) 22944 Job Title OSH 3305 Sheet I Made by FABIG Date RWB Checked by 2ALCULATION SHEET Date CAS Tlte worked examples are carried out for a module with blast relieving boundary walls.
074 bar. 5 msec. 376 bar. Technical NO^ 2 - AppcrdU A. 1 Job No. Rev. 9m inanarw6m x I 3 . b X March 1994 RWB March 1994 2 . 2 m2. 012 m and t, = 6 msec. 4 x lo6 N/m2/sec = 5000 N/m2 = 9 Kg/m2. 00 m $= 63 msec. 62 metres. The actual opening time will therefore be slightly longer. The precise value is however academic as the sbwness of the response would mean that the explosion pressure-time history would be quite diJferent from that assumed.
This reduces the effective venting area of the panel. K will be seen to be analogous to the term C, used for the ERP wall. Thus, where the explosion prediction model allows the boundaries to be defined in this way, the treatment of louvres is similar to the treatment of ERP’s. Where models use different methods to define boundaries, the explosion specialist should again be consulted. It was noted for ERP walls that Caj is likely to vary with gas velocity and density. This also applies to K. Coupled with the fact that air inflow is normally easier than air outflow, this means that louvres may provide a higher than anticipated resistance to the outflow of gases.
Explosion Mitigation Systems